再也不想看之前的low代碼了。。。

#!/usr/bin/env python

data = {
    ‘北京‘: {
        "昌平": {
            "望京1": {"奔馳", "默默"},
            "國貿2": ("cicc", "HP"),
        },
        "朝陽": {
            "望京1": {"奔馳", "默默"},
            "國貿1": ("cicc", "HP"),
        },
    },
    ‘山東‘: {
        "昌平": {
            "
 
望京1": {"奔馳", "默默"},
            "國貿2": ("cicc", "HP"),
        },
        "朝陽": {
            "望京2": {"奔馳", "默默"},
            "國貿2": ("cicc", "HP"),
        },
    },
    ‘廣東‘: {
        "昌平": {
            "望京1": {"奔馳", "默默"},
            "國貿2": ("cicc", "HP"),
        },
        "朝陽": {
            
 
"望京3": {"奔馳", "默默"},
            "國貿4": ("cicc", "HP"),
        },
    },
}
current_layer = data
layerlist = list()
while True:
    for i in current_layer:
        print(i)
    choice = input("選擇進入,按b返回,按q退出>>:")
    if choice in current_layer:
        try:
            layerlist.append(current_layer)
            current_layer 
 
= current_layer[choice]
        except TypeError:
            current_layer = current_layer
        continue
    elif choice.lower() == ‘b‘:
        try:
            current_layer = layerlist.pop()
        except IndexError:
            pass
        continue
    elif choice.lower() == ‘q‘:
        exit("bye~~")

day2-三級菜單---改良版